Same for me i'm trying to remap the default I/O on the beaglebone with my
custom kernel i've just compile :
I need to modify the default configuration of pinmuxing on the BBB. To do
so i'm trying to modify the am335x-boneblack.dts before recompiling the
kernel. But that file is very awkward. I've only found information about
overlay, but i need this by default not with overlay.
This is for example the pinmuxing I use to define TOR I/O with an overlay
DT:
pinctrl_test: pinctrl_test_0_pins {
pinctrl-single,pins = <
0x078 0x07 /* P9_12 OUTPUT | MODE7 | PULLDOWN */
0x048 0x07 /* P9_14 OUTPUT | MODE7 | PULLDOWN */
0x040 0x07 /* P9_15 OUTPUT | MODE7 | PULLDOWN */
0x04c 0x07 /* P9_16 OUTPUT | MODE7 | PULLDOWN */
0x15c 0x07 /* P9_17 OUTPUT | MODE7 | PULLDOWN */
0x158 0x07 /* P9_18 OUTPUT | MODE7 | PULLDOWN */
0x044 0x07 /* P9_23 OUTPUT | MODE7 | PULLDOWN */
0x1ac 0x07 /* P9_25 OUTPUT | MODE7 | PULLDOWN */
0x030 0x27 /* P8_12 INPUT | MODE7 | PULLDOWN */
0x024 0x27 /* P8_13 INPUT | MODE7 | PULLDOWN */
0x028 0x27 /* P8_14 INPUT | MODE7 | PULLDOWN */
0x03c 0x27 /* P8_15 INPUT | MODE7 | PULLDOWN */
0x038 0x27 /* P8_16 INPUT | MODE7 | PULLDOWN */
0x02c 0x27 /* P8_17 INPUT | MODE7 | PULLDOWN */
0x08c 0x27 /* P8_18 INPUT | MODE7 | PULLDOWN */
0x020 0x27 /* P8_19 INPUT | MODE7 | PULLDOWN */
>;
};
What's the correct syntax to edit the main DT and register pin for TOR I/O,
ANA... The aim after that, is to develop driver to be able to read/write at
high speed (using register) on the different input/output.
Thanks.
Le lundi 17 août 2015 09:17:21 UTC+2, Mehmet Özgür Bayhan a écrit :
>
> Hi. I am using Robert C. Nelson's kernel on my Beagle Board Rev-C
>
> I want to use mmc2 ports as GPIO.
>
> There is 8 pins in mmc and the default configuration in device tree is =
>
>
>>
>>
>>
>>
>>
>>
>> *mmc2: mmc@480b4000 { compatible = "ti,omap3-hsmmc"; reg = <0x480b4000
>> 0x200>; interrupts = <86>; ti,hwmods = "mmc2"; dmas = <&sdma 47>, <&sdma
>> 48>; dma-names = "tx", "rx";};*
>
>
> but disbled default in omap3-beagle.dts. So how should i use these ports
> as GPIO(not as mmc2) and pull them HIGH and direction > out during sturtup?
>
> I am a newbie, I've tried many things but still can't solve.
>
> Any help could be great.
>
> Thanks.
>
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